Method Name

Reference Laboratory


Tacrolimus; FK506, FK506 Level

Specimen Required

one 5 mL lavender top tube

Specimen Minimum Volume

1.0 mL of blood

Specimen Stability Information

Stable for 1 week at room temperature.

Special Instructions

Therapeutic range is based on a whole blood specimen drawn 12 hours post-dose or prior to the next dose using the MEIA method. Some other factors influencing therapeutic range, dose administered, and result interpretation include time since transplantation, the organ transplanted, co-administration of other immunosuppressants, interaction with other drugs which may increase or decrease the tacrolimus concentration, and the preferences of the transplant centers and clinicians.

Performing Laboratory

As ordered. Turn around time is 1-3 days.

Reference Values

See report